.lt_container {
  background-color: #fff;
}
.left_first {
  width: 90px;
  height: 100%;
  float: left;
  position: relative;
}
.left_first li {
  height: 50px;
  border-right: 1px solid red;
  border-bottom: 1px solid red;
  text-align: center;
  line-height: 49px;
  background-color: pink;
}
.left_first li.now {
  background-color: #fff;
  border-right: none;
}
.left_first li a {
  font-size: 16px;
  display: block;
}
.right_second {
  overflow: hidden;
  height: 100%;
  position: relative;
}
.right_second li {
  width: 33.33%;
  float: left;
  text-align: center;
}
.right_second li a {
  display: block;
}
.right_second li a img {
  width: 62px;
  height: 62px;
}
